Durable & Waterproof- The bike frame bag is made of PU + EVA material. It adopts waterproof fabric and compression hard shell design, and has a sealed zipper closure to ensure that water will not flow in. The hard shell will not be deformed even under severe conditions, which can better protect your items. Let you enjoy the fun of riding at any time.3 in 1 Large-Capacity- The bicycle frame bag can meet your daily needs. Each bag separated by mesh can help you place items more reasonably and separate hard objects from the phone to effectively prevent collision damage. And according to the design of the leg space when riding, it will not collide with or obstruct the legs.High Sensitive Touch Screen- This bike frame bag has a detachable mobile phone holder design. It can be easily removed by the Velcro on the reverse side. It is made of PU material and high-sensitivity TPU film window. The stable fixing method and sensitive touch screen can help you operate the phone conveniently while riding. There is a hidden headphone hole at the bottom that allows you to quickly access the headphones.Reflective Design- There are reflective patterns on both sides of the top tube bags. It can serve as a warning when cycling at night to avoid accidents and ensure driving safety at night. Bike frame bag is suitable for most bicycles, such as road bikes and mountain bikes.Easy to Install & Remove- Three velcro strips can firmly fix the bike frame bag on the bicycle frame. Even if you are riding on a rough road, the bike bag will not move around. You can adjust the length of the Velcro according to your own frame to make the top tube Bags more stable.